The general rule for lamb is, for every kilogram of weight, cook for an hour at 190 - 200 degrees Celsius, depending on the efficiency of your oven, or 180 degrees for a fan-f â¦ orced oven. Thus, a 2kg leg of lamb will take two hours.ow long it takes to cook a leg of lamb depends on how you well you  like the meat cooked. If you like it rare, it takes about 15  minutes per pound, if you like it medium i â¦ t takes about 25 minutes  per pound, and 30 minutes for well done. Answered.
Since the Girl Scouts of the USA began allowing their young female members to sell the iconic cookies digitally for the first time last December, 2.5 million boxes, or about $10 million worth, of the treats sold online in 2015.
There are 33 calories in 1 cookie (0.2 oz) of Girl Scouts Trefoils Cookies. You'd need to walk 9 minutes to burn 33 calories. Visit CalorieKing to see calorie count and nutrient data for all portion sizes.